galaxies

Count again

Astronomers using data from the NASA/ESA Hubble Space Telescopes and other telescopes have performed an accurate census of the number of galaxies in the Universe. The group came to the surprising conclusion that there are…


The Dark Wanderer

Astronomers have used NASA’s Chandra X-ray Observatory and ESA’s XMM-Newton X-ray observatory to discover an extremely luminous, variable X-ray source located outside the center of its parent galaxy. This peculiar object could be a wandering…


Pandora’s Magnifying Glass

In the ongoing hunt for the universe’s earliest galaxies, NASA’s Spitzer Space Telescope has wrapped up its observations for the Frontier Fields project. This ambitious project has combined the power of all three of NASA’s…


Starbridge in space

This image captured by the Subaru Telescope shows a “brook of stars” flowing through a galaxy. This stream of stars is actually the result of the dwarf galaxy NGC 4449 (lower left) devouring another nearby…


A furious former Milky Way

A giant bubble surrounding the centre of the Milky Way shows that six million years ago our Galaxy’s supermassive black hole was ablaze with furious energy. It also shines a light on the hiding place…


A dark galaxy

Using the world’s most powerful telescopes, an international team of astronomers has discovered a massive galaxy that consists almost entirely of Dark Matter. Using the W. M. Keck Observatory and the Gemini North telescope –…


Eye of Horus in the distance

Light from a distant galaxy can be strongly bent by the gravitational influence of a foreground galaxy. That effect is called strong gravitational lensing. Normally a single galaxy is lensed at a time. The same…